catch on on purpose provided that be aware of differ from consist of get ahead congratulate…on focus on sign up in the absence of hold the key to

（1）I don't

focus on

focus on

to what he is saying.
（2）She broke the dish

on purpose

on purpose

just to show her anger.
（3）I don't mind Mary coming with us

provided that

provided that

she pays her own meals.
（4）Most smokers

are

are

perfectly

aware of

aware of

the dangers of smoking.
（5）Humans

differ from

differ from

other mammals in their ability to speak.
（6）Class 13

consists of

consists of

4 lovely girls and 55 hard-working boys.
（7）She soon found that it wasn't easy to

get ahead

get ahead

in the movie business.
（8）

In the absence of

In the absence of

any evidence，the police had him go.
（9）The weather

holds the key to

holds the key to

our success or failure.
（10）We

congratulated

congratulated

our team

on

on

coming first in the competition.